<template>
  <view class="cart-container" v-if="total"  style="background-color: #fff;">
    <!-- 收货地址组件 -->
    <my-address></my-address>
    
    <!-- 购物车商品列表的标题区域 -->
      <view class="cart-title">
        <!-- 左侧的图标 -->
        <uni-icons type="shop" size="18" color="#000"></uni-icons>
        <!-- 描述文本 -->
        <text class="cart-title-text">购物车</text>
      </view>
      
      <!-- 商品列表区域 -->
      <uni-swipe-action>
        <view class="" v-for="(goods,i) in cart" :key="i">
          <uni-swipe-action-item :right-options="options" @click="swipeActionClickHandler(goods)">
            <my-goods  @goToDetail='goToDetail' @radio-change='radioChangeHandler' @count-change='countChangeHandler' show-radio="true" show-num="true" :goods="goods"></my-goods>
          </uni-swipe-action-item>
        </view>
      </uni-swipe-action>
      
    <!-- 结算组件 -->
      <my-settle></my-settle>
  </view>
  
  <!-- 空白购物车区域 -->
  <view class="empty-cart" v-else>
    <image src="/static/cart_empty@2x.png" mode=""></image>
    <text class="tip-text">购物车空空如也~</text>
  </view>
</template>

<script>
  // 按需导入mapState这个辅助函数
  import {mapState,mapMutations,mapGetters} from 'vuex'
  // 导入自己封装的mixin模块
  import badgeMix from '@/mixins/tabbar-badge.js'
  export default {
    data() {
      return {
        options: [{
          text: '删除', // 显示文本内容
          style: {
            backgroundColor: '#c00000' // 按钮的背景颜色
          }
        }]
      };
    },
    computed: {
      // 将m_cart模块中的cart映射到当前页面中使用
      ...mapState('m_cart',['cart']),
      ...mapGetters('m_cart',['total'])
    },
    // 将badgeMix混入到当前到当前的页面中进行使用
    mixins: [badgeMix],
    methods: {
      ...mapMutations('m_cart',['updateGoodsState','updateGoodsCount','deleteCartGoods']),
      
      // 商品勾选状态发生了变化
    radioChangeHandler(e){
      this.updateGoodsState(e)
    },
    
    // 商品数量发生变化
    countChangeHandler(e){
      this.updateGoodsCount(e)
      this.setTab()
    },
    
    // 更新徽标数据
    setTab(){
      uni.setTabBarBadge({
        index: 2,
        text: this.total + ''
      })
    },
    
    // 删除按钮的点击事件
    swipeActionClickHandler(goods){
      this.deleteCartGoods(goods)
      this.setTab()
    },
    goToDetail(goods_id){
      uni.navigateTo({
        url: '/subpkg/goods_detail/goods_detail?goods_id='+goods_id
      })
    }
    }
  }
</script>

<style lang="scss">
  .cart-container{
    padding-bottom: 50px;
  }
.cart-title{
  height: 40px;
  display: flex;
  align-items: center;
  font-size: 14px;
  padding-left: 5px;
  border-bottom: 1px solid #efefef;
  
  .cart-title-text{
    margin-left: 10px;
  }
}

.empty-cart{
  display: flex;
  flex-direction: column;
  align-items: center;
  padding-top: 150px;
  
  image{
    width: 90px;
    height: 90px;
  }
  
  .tip-text{
    font-size: 12px;
    color: gray;
    margin-top: 15px;
    
  }
}
</style>
